bfd/coff-sparc.c

   1 /* BFD back-end for Sparc COFF files.
   2    Copyright (C) 1990-2017 Free Software Foundation, Inc.
   3    Written by Cygnus Support.
   4
   5    This file is part of BFD, the Binary File Descriptor library.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "bfd.h"
  24 #include "libbfd.h"
  25 #include "coff/sparc.h"
  26 #include "coff/internal.h"
  27 #include "libcoff.h"
  28
  29 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)
  30
  31 #define BADMAG(x) ((x).f_magic != SPARCMAGIC && (x).f_magic != LYNXCOFFMAGIC)
  32
  33 /* The page size is a guess based on ELF.  */
  34 #define COFF_PAGE_SIZE 0x10000
  35
  36 enum reloc_type
  37   {
  38     R_SPARC_NONE = 0,
  39     R_SPARC_8,          R_SPARC_16,             R_SPARC_32,
  40     R_SPARC_DISP8,      R_SPARC_DISP16,         R_SPARC_DISP32,
  41     R_SPARC_WDISP30,    R_SPARC_WDISP22,
  42     R_SPARC_HI22,       R_SPARC_22,
  43     R_SPARC_13,         R_SPARC_LO10,
  44     R_SPARC_GOT10,      R_SPARC_GOT13,          R_SPARC_GOT22,
  45     R_SPARC_PC10,       R_SPARC_PC22,
  46     R_SPARC_WPLT30,
  47     R_SPARC_COPY,
  48     R_SPARC_GLOB_DAT,   R_SPARC_JMP_SLOT,
  49     R_SPARC_RELATIVE,
  50     R_SPARC_UA32,
  51     R_SPARC_max
  52   };
  53
  54 /* This is stolen pretty directly from elf.c.  */
  55
  56 static bfd_reloc_status_type
  57 bfd_coff_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
  58                         arelent *reloc_entry,
  59                         asymbol *symbol,
  60                         void * data ATTRIBUTE_UNUSED,
  61                         asection *input_section,
  62                         bfd *output_bfd,
  63                         char **error_message ATTRIBUTE_UNUSED)
  64 {
  65   if (output_bfd != (bfd *) NULL
  66       && (symbol->flags & BSF_SECTION_SYM) == 0)
  67     {
  68       reloc_entry->address += input_section->output_offset;
  69       return bfd_reloc_ok;
  70     }
  71
  72   return bfd_reloc_continue;
  73 }
  74
  75 static reloc_howto_type coff_sparc_howto_table[] =
  76 {
  77   HOWTO(R_SPARC_NONE,    0,3, 0,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_NONE",    FALSE,0,0x00000000,TRUE),
  78   HOWTO(R_SPARC_8,       0,0, 8,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_8",       FALSE,0,0x000000ff,TRUE),
  79   HOWTO(R_SPARC_16,      0,1,16,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_16",      FALSE,0,0x0000ffff,TRUE),
  80   HOWTO(R_SPARC_32,      0,2,32,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_32",      FALSE,0,0xffffffff,TRUE),
  81   HOWTO(R_SPARC_DISP8,   0,0, 8,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP8",   FALSE,0,0x000000ff,TRUE),
  82   HOWTO(R_SPARC_DISP16,  0,1,16,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP16",  FALSE,0,0x0000ffff,TRUE),
  83   HOWTO(R_SPARC_DISP32,  0,2,32,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP32",  FALSE,0,0x00ffffff,TRUE),
  84   HOWTO(R_SPARC_WDISP30, 2,2,30,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP30", FALSE,0,0x3fffffff,TRUE),
  85   HOWTO(R_SPARC_WDISP22, 2,2,22,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP22", FALSE,0,0x003fffff,TRUE),
  86   HOWTO(R_SPARC_HI22,   10,2,22,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_HI22",    FALSE,0,0x003fffff,TRUE),
  87   HOWTO(R_SPARC_22,      0,2,22,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_22",      FALSE,0,0x003fffff,TRUE),
  88   HOWTO(R_SPARC_13,      0,2,13,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_13",      FALSE,0,0x00001fff,TRUE),
  89   HOWTO(R_SPARC_LO10,    0,2,10,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_LO10",    FALSE,0,0x000003ff,TRUE),
  90   HOWTO(R_SPARC_GOT10,   0,2,10,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT10",   FALSE,0,0x000003ff,TRUE),
  91   HOWTO(R_SPARC_GOT13,   0,2,13,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT13",   FALSE,0,0x00001fff,TRUE),
  92   HOWTO(R_SPARC_GOT22,  10,2,22,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT22",   FALSE,0,0x003fffff,TRUE),
  93   HOWTO(R_SPARC_PC10,    0,2,10,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC10",    FALSE,0,0x000003ff,TRUE),
  94   HOWTO(R_SPARC_PC22,    0,2,22,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC22",    FALSE,0,0x003fffff,TRUE),
  95   HOWTO(R_SPARC_WPLT30,  0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_WPLT30",  FALSE,0,0x00000000,TRUE),
  96   HOWTO(R_SPARC_COPY,    0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_COPY",    FALSE,0,0x00000000,TRUE),
  97   HOWTO(R_SPARC_GLOB_DAT,0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_GLOB_DAT",FALSE,0,0x00000000,TRUE),
  98   HOWTO(R_SPARC_JMP_SLOT,0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_JMP_SLOT",FALSE,0,0x00000000,TRUE),
  99   HOWTO(R_SPARC_RELATIVE,0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_RELATIVE",FALSE,0,0x00000000,TRUE),
 100   HOWTO(R_SPARC_UA32,    0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_UA32",    FALSE,0,0x00000000,TRUE),
 101 };
 102
 103 struct coff_reloc_map
 104 {
 105   bfd_reloc_code_real_type bfd_reloc_val;
 106   unsigned char coff_reloc_val;
 107 };
 108
 109 static const struct coff_reloc_map sparc_reloc_map[] =
 110 {
 111   { BFD_RELOC_NONE, R_SPARC_NONE, },
 112   { BFD_RELOC_16, R_SPARC_16, },
 113   { BFD_RELOC_8, R_SPARC_8 },
 114   { BFD_RELOC_8_PCREL, R_SPARC_DISP8 },
 115   { BFD_RELOC_CTOR, R_SPARC_32 }, /* @@ Assumes 32 bits.  */
 116   { BFD_RELOC_32, R_SPARC_32 },
 117   { BFD_RELOC_32_PCREL, R_SPARC_DISP32 },
 118   { BFD_RELOC_HI22, R_SPARC_HI22 },
 119   { BFD_RELOC_LO10, R_SPARC_LO10, },
 120   { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 },
 121   { BFD_RELOC_SPARC22, R_SPARC_22 },
 122   { BFD_RELOC_SPARC13, R_SPARC_13 },
 123   { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 },
 124   { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 },
 125   { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 },
 126   { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 },
 127   { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 },
 128   { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 },
 129   { BFD_RELOC_SPARC_COPY, R_SPARC_COPY },
 130   { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT },
 131   { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT },
 132   { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE },
 133   { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 },
 134   /*  { BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */
 135 };
 136
 137 static reloc_howto_type *
 138 coff_sparc_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 139                               bfd_reloc_code_real_type code)
 140 {
 141   unsigned int i;
 142   for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct coff_reloc_map); i++)
 143     {
 144       if (sparc_reloc_map[i].bfd_reloc_val == code)
 145         return &coff_sparc_howto_table[(int) sparc_reloc_map[i].coff_reloc_val];
 146     }
 147   return 0;
 148 }
 149 #define coff_bfd_reloc_type_lookup      coff_sparc_reloc_type_lookup
 150
 151 static reloc_howto_type *
 152 coff_sparc_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 153                               const char *r_name)
 154 {
 155   unsigned int i;
 156
 157   for (i = 0;
 158        i < (sizeof (coff_sparc_howto_table)
 159             / sizeof (coff_sparc_howto_table[0]));
 160        i++)
 161     if (coff_sparc_howto_table[i].name != NULL
 162         && strcasecmp (coff_sparc_howto_table[i].name, r_name) == 0)
 163       return &coff_sparc_howto_table[i];
 164
 165   return NULL;
 166 }
 167 #define coff_bfd_reloc_name_lookup coff_sparc_reloc_name_lookup
 168
 169 static void
 170 rtype2howto (arelent *cache_ptr, struct internal_reloc *dst)
 171 {
 172   BFD_ASSERT (dst->r_type < (unsigned int) R_SPARC_max);
 173   cache_ptr->howto = &coff_sparc_howto_table[dst->r_type];
 174 }
 175
 176 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 177
 178 #define SWAP_IN_RELOC_OFFSET    H_GET_32
 179 #define SWAP_OUT_RELOC_OFFSET   H_PUT_32
 180 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
 181   cache_ptr->addend = reloc.r_offset;
 182
 183 /* Clear the r_spare field in relocs.  */
 184 #define SWAP_OUT_RELOC_EXTRA(abfd,src,dst) \
 185   do { \
 186        dst->r_spare[0] = 0; \
 187        dst->r_spare[1] = 0; \
 188      } while (0)
 189
 190 #define __A_MAGIC_SET__
 191
 192 /* Enable Sparc-specific hacks in coffcode.h.  */
 193
 194 #define COFF_SPARC
 195
 196 #define bfd_pe_print_pdata      NULL
 197
 198 #include "coffcode.h"
 199
 200 #ifndef TARGET_SYM
 201 #define TARGET_SYM sparc_coff_vec
 202 #endif
 203
 204 #ifndef TARGET_NAME
 205 #define TARGET_NAME "coff-sparc"
 206 #endif
 207
 208 CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, D_PAGED, 0, '_', NULL, COFF_SWAP_TABLE)